Moistureproofing



- March 1 193s. F, R Moco@ ,2,109,749 MOISTUREBR'OOFING Original FiledNov. 7, 1933 5 'Sheets-Sheet l v l ATTORNEY.

,BY www March l, 1938. F. P. MccoLL MoIsTUREPRooFING original Filed Nov.7, 193s 5 sheets-sheet 2 Fmwlislz/v/ Ccou A SM.

March 1, F, P MgCOLL I MOISTUREPROOFING Original Filed Nov. 7, 1933 5Sheets-Sheet 3' l i i 70 I INVENTOR.

W/MQSPWZJCOM ATTORNEY.

Patented Mar. l, 1938 UNITED STATES MOISTUREPROOFIN G Francis P. McColl,St. Andrews, New- Brunswick, Canada; Mary` Pamelia McColl executnx of.said Francis P. McColl, deceased Original application November 7, 1933,Serial No; 697,011. Divided and this application December 3, 1934,Serial No.

7 Claims.

My invention relates to improvements in laminating or coating paper,card, or other material, or containers of the same by cellulose or othersubstantially moisture-proofl materials, preferably transparent, and has`especially to do with, an'd is illustrated in the accompanying drawingsin its application to the moisture-proofing and formation of containerssuch as paper' cans, and

more particularly, has reference' to means for l', laminating sheets ofmaterial for lining, and `covering in some instances, the exterior aswell as the interior of such container, thus providing an inner or outercovering, coating or laminating of substantially non-porous, andpreferably I3 transparent material, and in some instances, .thecontainer is provided between the body of the container and the coveringwith a sheet of material such as paper, sometimes colored, producing theeffect of enameling, and involves the seal- :fl ing, fusing, orhermetical binding of the walls of the container and laminations wherethe same join, such as at the seams or laps, thus in most instancesforming a complete unitary, substan- Figure 4 illustrates in perspectivean arrange-- ment of body material, label and linings for straightWinding;

Figure 5 is a perspective view of the body of a can made with acomposite strip arranged substantially as shown in Figure 4;

Figure 6 illustrates in plan view a built-up or composite strip forforming into the cylinder -5 body portion of a container;

Figure 7 is a sectional View through one end portion of a cylindricalvessel lined and covered as per the present invention.

Figure 8 is a sectional view through one of the thereto.

' Figure 9 is a sectional view illustrating the initial association ofthe, container of Figure 7 and the head of Figure 8.

Figure 10 is a similar view illustrating the head locked in place.

Figure 11 is an edge view of a preformed strip going into the making ofthe container of Figure 7; and

60 Figure 12 is a plan view of a blank illustrating heads of suchcontainer before application` (Cl. 22S-3.5)

the manner of formation ofthe preformed strip of Figure 11. I

Referring now more particularly to Figure 1, the same illustrates rolls6 and 1, of very thin cellulose or other suitable non-porous, preferablytransparent materal, and 8 indicates a similar roll of paper stock orcard to be laminated or covered with the transparent, non-porousmaterial, 9, I0, indicate troughs lof methol cellosolve, a solvent forthe cellulose, containing rosin, gum, acetate," and sometimes otheringredients, which may be used as a solvent, cement or adhesive forsticking or fastening the cellulose sheet to the card or board, and toitself Where the same overlaps. Such a solution may be made up asfollows: heavy acetate, 75 parts and methol cellcsolve 50 parts, towhich may be added 5 parts of Igum or 73 parts of acetate may be used to10 parts of a suitable gum with parts methol cellosolve. In any case,the adhesive or binder preferably is such that it has some dissolvingeffect so that the margin of the cellulose where overlapped is actuallyunited, bonded and lhermetically attached; thus forming an integral orcontinuouspiece, while at the same time it serves as a filler and anadhesive.

II, I2 indicate rollers upon shafts I3, I4 adapted to rotate Within thetroughs A9, I0, and in the solution referred to, said solution beingindicated by the reference characters I5, I 6 and I'I, I8 lndicaterollers similarly mounted and contacting with the partially immersedrollers II, i2, as shown, to pick up and take the adhesive, and pass itto the under-surface of the strips or webs of cellulose, I9, 20, as thesame pass over theV paper 23, and that the inne'r margins of thecellulose strips at opposite faces of the card overlap (with the cardorboard between) as shown' at Figure 2, while the outer margins rthereofat opposite faces and opposite sides of the card o1' 'board extendbeyond the board or card. Y

Referring now again to Figure 1, I have ind'- cated at 24, a suitablefolder or seamer of any desirable shape such as is wellz-known in thepaper foldingy arts, so that as the composite strip 25 feeds through thesame with the marginal portion'l and 20 of cellulose extending, saidroll 33, which may now be used for forming cylindrical containers suchas paper cans, and, of course it will be readily understood thattinplate or other material may be used instead of card or paper, ifdesired.

When a tapered container is desired, a blank is cut and formed,substantially as shown in Figure 3, instead of having straight parallelsides as' v shown in Figure 2. Such a container is formed by rolling oneend of the blank shown in Figure 3 within the other, until the lateralmargins overlap, whereupon the inner and outer walls of the cone thusformed will be found to be entirely covered with the transparentmaterial, and the overlapping margins may then be cemented or bondedtogether, thus forming a tapered or cone-like tube, having asubstantially continuous inner and outer wall or lamination ofsubstantially water-proof and transparent material.

As an adhesive, I may dissolve rosin in dibutylphthylate or, I may useester gum in place of the rosin,-about seventy-live partsof the gum toabout twenty-five parts dibutylphthylate, which can be thinned byheating.

Referring now more particularly to Figures '1 to 12 inclusive, it willbe observed, especially by reference to the latter figure, that a longstrip of card 65 may be prepared in a manner similar to Figures l and 2with a piece of cellulose 66 at one side upon the under face, with anextending marginal portion 61 as shown, and at the opposite side of thestrip of card 65 may be provided a strip of labels 68 on the upper facewith extending margin 69. This composite sheet may be cut along the line'10, according to the height of the can or container to be made, so thateach strip for each container contains the moisture-proof strip 66, 61,which is rolled inside the coil, and the label 68, 69, on the oppositeside and opposite face of the strip, forms the outside of the coiledcylinder or body portion of the container to be formed. The free margin61 is fused to the opposite end 66 by overlapping the same thereupon,and the free end 69 of the label 68 is overlapped upon itself andfastened thereto by suitable adhesion after the wall of the containerhas been formed. The paper or card may be of any suitable cheap grade ofmaterial suicient for the necessary body and strength of the container,thus forming a cylinder having a non-porous lining with an outer labeland, if desired, a piece of colored paper may `be laminated between thenon-porous strip 66, 61

and the paper 65 to show color therethrough, giving in effect anenameled appearance for the interior of the container, while at the sametime minimizing the amount of-absorption by the surface to which the lmis fastened. Also, it will bev readily understood, that the label 68, 69may be covered with a suitable lm of non-porous and transparentmaterial,thus protecting the printing thereon and producing an outer highlypolished surface, much superior to ordinary highclass labels. The stripsfor forming successive cylinders of predetermined length, cut from thecomposite strip along the line 10, may be supplied in bundles andsuccessively fed to the forming mandrel of the tubeQmakin'g machine, or

may be fed from the continuous strip and cut off as required for forminginto cylinders.

f The'form of cylinder shown in Figure 7 is provided with a suitableinner lining 1|, and an outer label or covering 12, the intervening bodyof the wall being indicated at 13. A suitable head, covering or end forthis container is illustrated in Figure 8, the same being preferablyformed of metal such as tin, having an upwardly domed central portion14, with side wall 15, and base flange 16, preferably terminating in aperipheral inwardly turned portion 11. 18 indicates a disc of non-porousmaterial, and the outer diameter of the Wall 15 is very slightly greaterthan the internal diameter of the body shown in Figure 7, so that as thehead and body portion are pressed together, the lower, inner I edge 19of the wall strikes the rounded shoulder 88 of the head or end, carryingthe margin of the disc 18 down tightly, squeezing the same against thewall 15, and a suitable solvent having been first applied to the uppermarginal surface of the disc 18, or base ofthe lining 1| and inner wall13, causes the fusion of the margin of the disc 18 and lining 1|entirely around the container, the same being now in the position shownin rFigure 9. The next operation brings the re. maining portion of themoistened base flange 16 upwardly, andthe peripheral portion 11 is nowforced against the outer wall of the container, while at the same time,the wall 15 is now preferably pressed outwardly at the shoulder 80, asindicated at 8|, thus slightly restricting the container wall at thatpoint, while the inturned portion 11 further restricts it adjacent thesame point, thus interlocking the wall of the container to the head,making a secure, immovable fastening, while at the same time providing acontinuous, integral, inner lining of non-porous material within theouter body portion of the card of other material, it being understoodthat a head or end similar to that shown is, of course, applied at theopposite end of the body portion. A removable cap without therestricting elements 11 and 8| may also be so formed, and may be sealedto the container by applying solvent between adjacent faces of the caplining at 18 and wall lining at 1|. It has been found that this methodof moisture-proofing a container is much more economical and certainthanby spraying the interior of the container with the non-porous materialin vliquid eform,--first, for the reason that morenonporous materialwould have'to be used as a solution, and the same being usuallyvolatile, further head joins the body portion, and necessitates aIpre-treatment such as with solvent or sealing agent-at that pointbetween the head lining and the wall lining, whereas, when laminating orcovering with pre-formed sheet material, an extremely thin web or lm ofmaterial may be used, even as thin as a half thousandth of an inch, andbeing uniformly and thoroughly fastened to the inside of the container.has all of the necessary strength and impervious qualities, while at thesame time providing a much superior finish and appearance, also lendingitself to underlaid sheets, much as for coloring vand enameling effects.

In some instances, such as for tobacco or cigar cans, the imperviousfilm may be placed over the label only on the outside of the container,instead of on the inside, and in that'case, the inside may be lined witha softer material, such as rough paper, which may be previously soakedin tobacco juice, and the container may be formed while this soft liningismoist with the tobacco juice, so that when the cigars are inserted,and the container is sealed closed,` it serves as a humidifler, sealingthe moist air within the container until such time as it is opened. Insuch case, the impervious coverings applied to the heads or ends of thecontainer would still preferably be on the inside thereof as described,especially where the same are formed of tin, for the purpose ofpreserving the same from the rusting Aeffect of the moisture, though-ofcourse the heads may also be covered externally to form a completeexternal impervious covering or coating.

'I'he solvent is preferably in fact also a illler".

That is to say, I have found that by using a solvent or adhesive whichhas also a filler combined therewith, that the moisture-proof propertiesof the covering or lining are improved, probably for the reason that thecellulose is what might -be termed cellular or porous under amiscroscope, and the filler by filling in the pores or cells of thesheet close them while the solvent fuses the sheet together, or fastensthem whensome other adhesive is used, the filler being forced into thecells or spaces by the pressure of the rollers during the laminatingoperation.

In the modicatlon shown in Figures 4 and 5,

the can is shown made of a direct or straight convolute winding, inwhich case a strip of film 88 is provided of a sufiicient length to passcompletely around the interior of the can to be made, a marginal portion88 overlapping and fusing to the margin 88, so as to form a completeunitary integral lining or cylinder. To the opposite side of the lm 88is suitably secured an underlining of paper 8| which may be white or,any other color and, showing through the film 88 produces an interiorenameled effect. This lining paper 8| is backed by filler or card 82.the lining paper and card being of sufficient length according to thenumber of turns or convolutions intended for the wall of the container.At the outer end or margin 82' of the paper and board strip of label 88is secured as shown, and at the opposite side a film strip as indicatedat 84, so that after the paper and board 8|, 82 have been wound, thesame is followed by the label 88 covered by the nlm 84, the end margin88 of which overlaps the margin at the opposite end, thus pro-` viding acontainer wall or cylinder laminated inside and out with film beneaththe inner surface of which is a white or colored paper, and betweenwhich and the outer. laminated label is provided the board nller.

By reference particularly to Figure 4, it will be observed that when thecylinder wall is rolled in straight convolute manner, the margins 88,8l'

of the foregoing outer tllm will extend above and below the ends of thebody of the can. By now moistening the inside of these margins, andturning them inwardly over the top and bottom edges of the can, beforepressing a head or heads into the can ends, the top and bottom edges ofthe can'will be covered or sealed, and will not absorb moisture, and theinner and outer film covering of the can will be joined or fusedtogether. i

In thelmodillcation shown in Figure 6, a composite or laminated stripsuitable for straight winding upon a mandrel is shown with parts brokenaway. |85 indicates the inner lining or film portion, |86 a coloredpaper thereunder, |81 the board or other body material, |88 the label,and |88 the outer lamination of film with margin |l|8 for sealingthereto. l

Containers made as thus described are preferably lled invertedly, thatis, from the bottom, after which the bottom may be readily headed orseamed with a suitable end of paper or metal of either the type seen at14 or any of the wellknown types, as may be desired.

What is claimed as new and is desired to be secured by Letters Patent ofthe United States is:

1. A paper receptacle having a rolled body portion, the blank of whichconsists of a strip of body forming paper, a section of moistureprooflining paper secured atwise upon one surface of said body paper adjacentto one side edge.

-jecting beyond the relatively opposite side there- 3. A blank for arolled paper receptacle as set forth in claim 2, wherein the projectingportions of the lining and wrapper papers extend in relatively oppositedirections around, andere secured over, the opposite side edges of thebody kpallier- 4. A blank for a rolled paper receptacle rset forth inclaim 2, wherein a colored opaque paper is secured between the liningpaper and the body paper, and wherein the lining paper is transparent. I

5. A blank for a rolledpa'per receptacle as set forth in claim 2,wherein the colored opaque paper extends entirely across the respectivesurface of the body paper.

6. A blank for a rolled paper receptacle as set forth in claim 2,wherein a transparent protecting sheet is secured flatwise over theobverse face of the wrapper paper.

'1. A blank for a rolled paper receptacle as set forth in claim 2,wherein a transparent sheet is secured flatwise to cover the obverseface of the wrapper paper and projects at three sides therebeyond.

More P. n

